Question

Which of the following statement is incorrect about $E_{1}cB$ reaction?

• A. It proceeds via the formation of carbanion intermediate.
• B. Strong EWG and poor leaving group favors the reaction.
• C. It is a unimolecular reaction
• D. The reaction proceeds through carbocation.

Answer 1

The correct option is D The reaction proceeds through carbocation.

E1cB proceeds via the formation of carbanion intermediate.
Strong EWG at the $\beta$ carbon and poor leaving group favors the E1cB reaction.
E1cB is a unimolecular reaction, the rate of the reaction depends on the formation of resonance stabilised conjugate base.
E1cB reaction proceeds through the conjugate base of the starting material.
Option D is incorrect because in $E_{1}cB$ reaction through the conjugate base of the starting material